Improvement in needle-sharpeners



J. M. MASON.

Improvement in Needle-Sharpeners I No. IZQ,673, Patentedluly23,1872.

PATENT OFFICE.

JOHN M. MASON, OF CHELSEA, MASSACHUSETTS.

IMPROVEMENT IN NEEDLE'SHARPENERS.

Specification forming part of Letters Patent No. 129,673, dated July 23,1872.

Specification describing certain Improvements in Device for SharpeningNeedles or other pointed articles, invented by JOHN M. MASON, ofChelsea, in the county of Sufiolk and State of Massachusetts.

The nature and object of my invention consist in revolving a piece ofsolid emery, file, or other suitable material around the point to besharpened, placed at a suitable angle'to make the proper point.

angle as to give the proper bevel, and of such size and form as to holdthe sharpening material. The hole D is for the purpose of makingsuitable connection to the driving-power.

The operation of this device is, after being attached to itsdriving-power, to insert the needle or point to be sharpened in the hole0, holding it stationary and pressing it against the sharpening materialuntil the proper point is formed.

I prefer flattening the material on the side that comes in contact withthe points to be sharpened, as shown in Fig. 3, so that the piece to besharpened may not catch and revolve with the device.

I claim The device herein specified, substantially as and for thepurpose hereinbefore set forth.

JOHN M. MASON.

Witnesses:

W. H. COLBY, ERASTUS RUG e.

